原子吸收光谱法分析铝土矿中氧化镁

Analysis of MgO in Bauxite by AAS

本文提出了将试样用氢氧化钠熔融后，转换为酸性溶液，在盐酸介质中直接引入原子吸收测定。主体元素铝、钛、硅对测定有干扰，用氯化锶消除。本方法操作简便、再现性好、灵敏度高，ＭｇＯ０－４０μｇ／５０ｍＬ呈良好线性关系，测量下限可达０．０３％，适用于铝土矿中氧化镁的测定。

It is reported that,having been fused by NaOH,the sample can be changed into acid solution,while AAS can be directly introduced into the medium of chlorhydric acid.Many main elements such as aluminium,titanium and silicon can disturb the determination,while which can be eleminated by using SrCl 2.This method is characterised with easily operation,good reproductivity and high sensitivity.Also it represents a good linear relation with MgO of 0—40μg/50mL.The determination limit may be to 0.03%.This method can be used into the determination of MgO in bauxite.